In "A Bilateral Division of the Parietal Bone in a Chimpanzee; with a Special Reference to the Oblique Sutures in the Parietal," Ales Hrdlicka, a prominent anthropologist and anatomist, provides an in-depth examination of an unusual anatomical feature observed in the skull of a chimpanzee. This scholarly paper focuses on a rare bilateral division in the parietal bone—a part of the skull situated near the top and sides of the head.Hrdlicka presents this study as a contribution to the understanding of skull morphology in primates, particularly in relation to the evolutionary development of humans and great apes. The parietal bone division, along with the presence of oblique sutures, is not common in primates, and Hrdlicka carefully describes the specifics of this case. Using detailed anatomical analysis, he compares the structure of the parietal bones in this chimpanzee to those of other primates and humans.